‘There is a clear inference that this was a call to start,’ Mr Sweeney said. ‘The three Tube bombs were all exploding within moments of each other.’

There was evidence they had hatched their conspiracy before the July 7 attacks killed 52 people, he claimed.

Omar, 26, from New Southgate; Ibrahim, 28, from Stoke Newington; Mohammed, of North Kensington; Osman, 28, and Asiedu, 33, both of no fixed address, and Adel Yahya, 24, from Tottenham, all deny conspiracy to murder and to cause explosions likely to endanger life. The case at Woolwich Crown Court continues.